Some Vermont faith communities are adding their voice to the discussion about immigrant farm workers in Vermont. The Vermont Ecumenical Council and Bible Society, which is made up of eight Christian denominations, released a statement Monday at the State House calling for ‘‘just and fair actions’’ regarding immigrants who work on many of the state’s dairy farms. A committee of the Vermont Legislature is looking into whether the estimated 1,500 to 2,000 illegal immigrants working on Vermont farms should be allowed to obtain driver’s licenses.